Ikeh, A. O, N. U Ndaeyo, and C. E. Ikeh. “Effects of Integrated Fertilization on Soil Sustainability and Cassava (Manihot Esculenta Crantz) Yield in an Ultisol”. Journal of Current Opinion in Crop Science 4, no. 2 (June 30, 2023): 89–102. Accessed December 11, 2023. https://jcocs.com/index.php/ej/article/view/197.